Everyone I know who has one really likes it. We've tried it twice -- once when Kuhio was an only child -- and again with Halo, Cammie and Pepper. They are all scared to death of it and run out of the kitchen the minute they hear the motor humming. We've tried leaving it plugged in for days and they never got used to it. Now, these are the same cats who run TOWARDS the trash compactor and garage door because they aren't scared of those loud noises. But a quiet, little motor hum.......